[Video] Nat Geo Photographer Shoots The Worlds Largest Cave

National Geographic photographer Boyd Matson takes us on a 25 minute journey through the 2.5-mile Hang Son Doong cave along the Vietnam-Laos border. This cave is 3 times the height of Niagara Falls and has a complete Jungle growing inside of it. If you have any interest in photography, biology, or geography, you have got to check out this video. Thanks to Dale Travers for submitting this video.